2019中考英语短文改错、首字母填空、阅读优享新题（4）
一、阅读理解。
A
（2019中考选练）
Running in Cold Weather Improves Performance
Cold weather during winter months may keep many people from leaving home and running in the open air. However, a new study shows that the drop in temperature is a good reason to run. In fact, researchers say, running in cold weather helps improve one’s performance.
Many people say running in winter can be difficult. Two reasons are the low temperatures and bitter winds. Yet many runners might find it easier than running in hot weather. That could be because lower temperatures reduce stress on the body. When you run in cold weather, your body loses less water than in warmer conditions. The body needs less water on a cold day than in warm weather. This information comes from sports scientists at St. Mary’s University in London.
John Brewer is a professor of applied sport science at St. Mary’s. For this study, he and other researchers put a group of people into a room they called an “environmental chamber”. The researchers then recreated summer and winter weather conditions in the room. The test subjects were asked to run 10,000 meters under both conditions. Brewer says he and his team recorded biological measurements（测量） of the runners. “We’ve got a group of subjects into the environmental chamber, we’ve changed the conditions to recreate summer or winter and we’ve got them to run 10km under both of those conditions and taken various measurements on each runner while they’ve been completing their 10km.”
They found that the runners lost water by around 30.38% more in those hotter conditions. Besides, Brewer says every movement runners make produces heat. He explains that one way in which we lose heat is by sweating（出汗）. He says the body also loses heat by transporting the blood to the surface of the skin. “That heat builds up in the body and can be really damaging unless you can lose that heat. And it’s much harder to lose heat when the environment is warm as well.” And they found their perception of heat was around a third lower when they were running in cold conditions. The body does not have to work as hard to pump blood to the skin’s surface.
Several websites note that the most important thing for people who run in cold conditions is to wear the right clothing. Keeping as dry as possible is the most important when exercising in low temperatures. So, if you are a runner, don’t let winter weather keep you indoors. Simply get ready for the low temperatures and start running.
1.According to the passage, John Brewer probably agrees that .
A.people should run 10,000 meters in winter
B.running in winter is good for your heart
C.people who run in winter like to wear thick clothing
D.running in cold conditions is better than in warm conditions
2.The underlined word “subjects” in Paragraph 3 probably means .
A.students that are being discussed
B.classes that you study at school
C.people that are being tested
D.runners that the artists paint
3.What can we infer from the passage?
A.Running can help us lose heat.
B.Running in cold weather is beneficial to our body.
C.The heat can’t damage our body.
D.The body does not have to work to pump blood.
4.What is the writer’s main purpose in writing this passage?
A.To introduce a research on running by Brewer.
B.To explain why running in winter is difficult for people.
C.To encourage people to run outside during winter months.
D.To advertise the new websites on running he created.
